OvmfPkg/Sec/X64/SecEntry.asm

   1       TITLE   SecEntry.asm
   2 ;------------------------------------------------------------------------------
   3 ;*
   4 ;*   Copyright 2006 - 2009, Intel Corporation
   5 ;*   All rights reserved. This program and the accompanying materials
   6 ;*   are licensed and made available under the terms and conditions of the BSD License
   7 ;*   which accompanies this distribution.  The full text of the license may be found at
   8 ;*   http://opensource.org/licenses/bsd-license.php
   9 ;*
  10 ;*   THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
  11 ;*   WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
  12 ;*
  13 ;*    CpuAsm.asm
  14 ;*
  15 ;*   Abstract:
  16 ;*
  17 ;------------------------------------------------------------------------------
  18
  19 #include "SecMain.h"
  20
  21 .code
  22
  23 EXTERN SecCoreStartupWithStack:PROC
  24
  25 ;
  26 ; SecCore Entry Point
  27 ;
  28 ; Processor is in flat protected mode
  29 ;
  30 ; @param[in]  RAX   Initial value of the EAX register (BIST: Built-in Self Test)
  31 ; @param[in]  DI    'BP': boot-strap processor, or 'AP': application processor
  32 ; @param[in]  RBP   Pointer to the start of the Boot Firmware Volume
  33 ;
  34 ; @return     None  This routine does not return
  35 ;
  36 _ModuleEntryPoint PROC PUBLIC
  37
  38     ;
  39     ; Load temporary stack top at very low memory.  The C code
  40     ; can reload to a better address.
  41     ;
  42     mov     rsp, INITIAL_TOP_OF_STACK
  43     nop
  44
  45     ;
  46     ; Setup parameters and call SecCoreStartupWithStack
  47     ;   rcx: BootFirmwareVolumePtr
  48     ;   rdx: TopOfCurrentStack
  49     ;
  50     mov     rcx, rbp
  51     mov     rdx, rsp
  52     sub     rsp, 20h
  53     call    SecCoreStartupWithStack
  54
  55 _ModuleEntryPoint ENDP
  56
  57 END